OpenBao has Reflected XSS in its OIDC authentication error message

보통 6.1CVE-2026-33758 · BIT-openbao-2026-33758 · GHSA-cpj3-3r2f-xj59 · Published 27/03/2026 · updated 15/07/2026

요약

CVE-2026-33758은(는) github.com/openbao/openbao, openbao (openbao)에 영향을 주는 보통 (CVSS 6.1) 취약점입니다.
향후 30일 내 악용 확률(EPSS): 0.30%, 전체 취약점의 22.5%보다 높음.
조치: 0.0.0-20260325133417-6e2b2dd84f0e, 2.5.2 이상으로 업데이트하세요.

Package	Affected versions	Patched versions
github.com/openbao/openbao Go	`< 0.0.0-20260325133417-6e2b2dd84f0e`	`0.0.0-20260325133417-6e2b2dd84f0e`
openbao openbao	`< 2.5.2`	`2.5.2`

Description

Impact

OpenBao installations that have an OIDC/JWT authentication method enabled and a role with callback_mode=direct configured are vulnerable to XSS via the error_description parameter on the page for a failed authentication.

This allows an attacker access to the token used in the Web UI by a victim.

Patches

The error_description parameter has been replaced with a static error message in v2.5.2

Workarounds

The vulnerability can be mitigated by removing any roles with callback_mode set to direct.

NVD description

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao installations that have an OIDC/JWT authentication method enabled and a role with `callback_mode=direct` configured are vulnerable to XSS via the `error_description` parameter on the page for a failed authentication. This allows an attacker access to the token used in the Web UI by a victim. The `error_description` parameter has been replaced with a static error message in v2.5.2. The vulnerability can be mitigated by removing any roles with `callback_mode` set to `direct`.